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3A (1) - Place value
Your Main Lesson Exercises
1. What value does the digit which is underlined have in the following numbers?
number spelled out
(e.g. two thousand)
number
(e.g. 2000)
no spaces
a)
4
1
23 567
*
*
b)
9 206 8
5
2
*
*
c)
3 1
6
0 504
*
*
d)
4 382
7
16
*
*
e)
7 504 93
8
*
*
f)
6
716 050
*
*
g)
8 9
3
8 271
*
*
h)
1 050 4
9
3
*
*
i)
2 27
1
605
*
*
j)
4
93 827
*
*
2. Use your calculator to change one number to another in one step, by adding or subtracting. (If you can do it in your head, all the better!)
a)
1 856 921
to
1 896 921
*
+
-
*
b)
3 270 387
to
3 270 307
*
+
-
*
c)
9 568 145
to
9 168 145
*
+
-
*
d)
2 329 036
to
2 929 036
*
+
-
*
e)
5 319 753
to
5 319 253
*
+
-
*
f)
4 208 642
to
4 278 642
*
+
-
*
3.
a)
300
x
10
=
*
b)
4000
÷
10
=
*
c)
1⁄10
of
480
=
*
d)
1⁄100
of
480
=
*
e)
9.2
x
10
=
*
f)
18.5
x
100
=
*
g)
980
÷
10
=
*
h)
82
÷
100
=
*
i)
1.6
x
100
=
*
j)
38.23
x
10
=
*
4. a) Which is greater 1 388 526 or 1 838 526?
*
b) Which is longer 592 876m or 592 786m?
*
m
c) Put these numbers into ascending order:
543 210
1
*
543 210
1 398 216
743 099
76 345
2 904 376
2
*
543 210
1 398 216
743 099
76 345
2 904 376
3
*
543 210
1 398 216
743 099
76 345
2 904 376
4
*
543 210
1 398 216
743 099
76 345
2 904 376
5
*
543 210
1 398 216
743 099
76 345
2 904 376
1 398 216
743 099
76 345
2 904 376
d) Put these numbers into descending order.
88 999
1
*
88 999
1 053 911
901 323
89 307
154 369
2
*
88 999
1 053 911
901 323
89 307
154 369
3
*
88 999
1 053 911
901 323
89 307
154 369
4
*
88 999
1 053 911
901 323
89 307
154 369
5
*
88 999
1 053 911
901 323
89 307
154 369
1 053 911
901 323
89 307
154 369
e) If 14 168 <
< 14 178
what number could
be?
*
If 813 274 <
< 813 374
what number could
be?
*
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